Measurements of Σ electromagnetic form factors in the timelike region using the untagged initial-state radiation technique
The process e thorn e- -> sigma thorn sigma over bar - is studied from threshold up to 3.04 GeV=c2 via the initial -state radiation technique using data with an integrated luminosity of 12.0 fb-1, collected at center-of-mass energies between 3.773 and 4.258 GeV with the BESIII detector at the BEPCII collider. The pair production cross sections and the effective form factors of sigma are measured in eleven sigma thorn sigma over bar - invariant mass intervals from threshold to 3.04 GeV=c2. The results are consistent with the previous results from Belle and BESIII. Furthermore, the branching fractions of the decays J=psi ->sigma thorn sigma over bar - and psi o3686 thorn -> sigma thorn sigma over bar - are determined and the obtained results are consistent with the previous results of BESIII.
WOS:001183211100012
2024-02-28
109
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034029
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Funder | Grant Number |
National Key R&D Program of China | 2020YFA0406300 |
National Natural Science Foundation of China (NSFC) | 12122509 |
Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program | |
CAS Center for Excellence in Particle Physics (CCEPP) | |
CAS Youth Team Program | YSBR-101 |
Joint Large-Scale Scientific Facility Funds of the NSFC and CAS | U1832207 |
CAS Key Research Program of Frontier Sciences | QYZDJ-SSW-SLH003 |
100 Talents Program of CAS | |
Institute of Nuclear and Particle Physics (INPAC) | |
Shanghai Key Laboratory for Particle Physics and Cosmology | |
European Union | 894790 |
German Research Foundation DFG | 455635585 |
Collaborative Research Center | CRC 1044 |
Istituto Nazionale di Fisica Nucleare, Italy | |
Ministry of Development of Turkey | DPT2006K-120470 |
National Research Foundation of Korea | NRF-2022R1A2C1092335 |
National Science and Technology fund of Mongolia | |
National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation of Thailand | B16F640076 |
Polish National Science Centre | 2019/35/O/ST2/02907 |
Swedish Research Council | |
U.S. Department of Energy | DE-FG02-05ER41374 |